QPV Low Pressure Valve Series

Brand: Proportion-Air, Inc

Ultra High Resolution electro-pneumatic closed-loop proportional pressure control valves.

The QPV pressure control valve utilizes a variable orifice valve on the inlet side, which eliminates the digital steps of traditional ON/OFF solenoids: The field adjustable hysteresis potentiometer allows users to virtually eliminate the dead-band of the control circuit, resulting in superior system resolution.

Ideal for very sensitive applications such as leak testing at low pressures, dispensing and microfluidics flow control.

The QPV-Series pressure control valve can provide resolutions (pressure steps) as high as ±0.005% of full scale calibration in single loop configuration.

The QPV can be calibrated as low as 0-2 Inches of Water Column or any calibration from full vacuum to 150 PSI.


Pressure Range

  • Vacuum thru 150 psi (10.3 bar)


  • ± 0.2 % of Full Scale


  • ± 0.02 % of Full Scale

Resolution (Max)

  • ± 0.005 % of Full Scale

Port Size

  • 1/8” NPT (BSPP Available)


  • Immune to Shock & Vibration (up to 25 Gs)

Operating Temperature

  • 32° to 158° F (0° to 70° C)


  • 40 micron

Maximum Flow

  • 1.2 scfm (34 LPM)


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